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Brand: TopWorx
TopWorx K-Series Valve Controllers K1 K2 K5L K7L
Description
Explosion-protected position monitors for hazardous areas
The TopWorx K-Series valve controllers cover the K1 and K2 families, with flameproof and intrinsically safe versions of K1P/K1S, K2P/K2S, K1/K2 Ex ia and K5L/K7L. The K5L/K7L section of the manual states that the unit monitors the position of on/off or modulating rotary or linear equipment and can also pneumatically control on/off equipment such as valve actuators, and that it is not suitable for multi-turn rotating equipment. The manual is a certification-centred document with safe-use, cable-entry and cam-setting instructions for each version.
Technical specifications
| Parameter | Specification |
|---|---|
| Versions in manual | K1P/K1S and K2P/K2S flameproof; K1/K2 Ex ia; K5L/K7L intrinsically safe |
| K1P/K1S flameproof classes | EC6: Ex db IIC T6 Gb / Ex tb IIIC T85 C Db, Ta -60 to +40 C, IP66/67; EC6H: Ta -60 to +70 C; EC4: Ex db IIC T4 Gb / Ex tb IIIC T135 C Db, Ta -60 to +80 C; EC4H: T4, Ta -60 to +80 C (+120 C) |
| K2P/K2S flameproof classes | E6: Ta -50 to +40 C; E6H: -50 to +70 C; E5: Ex db IIC T5 Gb, Ta -50 to +40 C; E4: T4, Ta -50 to +80 C; IP66/67; certificate Baseefa 16ATEX0121, IECEx BAS 16.0092 |
| K1/K2 and K5L/K7L marking | II 2 GD intrinsically safe Ex ia; non-mining equipment group |
| CSA information | K1P/K1S and K2P/K2S sections list CSA explosion-proof information for Class I Zone 1 and Class II areas, Type 4, 4X, 6, 6P |
| Cable entries | Up to four tapped entries; IP6X glands and blanking plugs required |
| Base mounting | Four M6 x 1 x 8 mm deep threaded holes on a 50 mm PCD |
| Cover | Retained by two stainless steel M6 socket head screws; visual position indicator versions have a slotted shaft |
| Internal temperature rise | Maximum 35 K; take into account when choosing cable |
| Switch ratings | Schedules of electrical ratings list switches, potentiometers and a remote solenoid circuit; for example switches Umax 275 V and Imax 9 A, solenoid Umax 275 V and Imax 2 A |
| Fasteners | Stainless steel A2-70 minimum |
Choosing a version
Pick the version from the area classification and gas group, then the ambient temperature class. The T-class and the permissible ambient temperature range differ between EC/E codes, so the nameplate must be matched to the site. The manual includes safe-use warnings such as not opening the cover when an explosive atmosphere is present, keeping flame paths clean and undamaged, and repair only by TopWorx. Switch cams are adjusted by sliding them off the spline hub and rotating, and the K-Series 4-20 mA and HART transmitter manuals are separate documents.
What to confirm before ordering
Confirm the certification scheme needed (ATEX, IECEx or CSA), gas group and temperature class, ambient range, cable entry thread, switch and solenoid configuration and the drive shaft or lever for the actuator. The manual does not contain a price list or ordering codes.
Documents and quotation
The TopWorx K-Series IOM (14 pages, 2017) is hosted on this page. See Valve Positioners for related products. Send the full model code, certification, quantity and mounting data for a quotation.
Datasheets & Documents
- Manual TopWorx K-Series IOM (14 pages, 2017) Download
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About brand
TopWorx is an American maker of valve position monitors, limit switches and discrete valve controllers, based in Louisville, Kentucky. Its GO Switch leverless limit switches sense a target without contact and are built for harsh and hazardous locations. Emerson acquired TopWorx in July 2008, extending its automation offering to on/off valves.
Seven Star LLC is an independent supplier in Muscat. We list TopWorx products for automated valves in Oman and the GCC.
TopWorx company profile
| Headquarters | Louisville, Kentucky, USA |
|---|---|
| Ownership | Emerson, since July 2008 |
| Known for | GO Switch leverless proximity limit switches |
| Product families | GO Switch 70 Series, D-Series, K-Series, TV-Series and TX-Series discrete valve controllers, DVR valve position monitor, PD100 and PD200 smart positioners |
TopWorx product series
The GO Switch 70 Series are leverless limit switches that sense a metal target without contact. Discrete valve controllers include the D-Series DXP, DXR and DXS, the TX-Series TXP and TXS, the TV-Series and the K-Series K1, K2, K5L and K7L.
The DVR is a valve position monitor and the PD Series PD100 and PD200 are smart valve positioners.
Valve controllers combine position sensing, solenoid valves and communication in one housing, which reduces wiring on automated valves. GO Switch sensors work without contact and suit dirty, wet or vibrating conditions.
Where TopWorx products are used
On-off and control valves in oil and gas, refineries, chemical and power plants and water treatment, including hazardous areas.
TopWorx products we list
Ordering TopWorx products: what we need
Send the full model code, the actuator mounting, switch type, solenoid and voltage, communication and the hazardous-area certification required.
Facts checked against Emerson's July 2008 acquisition announcement and TopWorx product literature, October 2026.
Browse TopWorx products by category: Valve Positioners.
Related products
Frequently Asked Questions
Which K-Series versions does the manual cover?
K1P/K1S and K2P/K2S flameproof, K1/K2 Ex ia and K5L/K7L intrinsically safe versions.
What protection level is stated for flameproof versions?
Ex db IIC with Ex tb IIIC dust protection and IP66/67, with T-class and ambient ranges depending on the option code.
Is it suitable for multi-turn valves?
The K5L/K7L section states the unit is not suitable for multi-turn rotating equipment.
How many cable entries are provided?
Up to four tapped cable entries, with IP6X cable glands and blanking plugs required.
How are switch cams set?
The cam is slid off the spline hub, rotated to the position needed and released to re-engage.
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